The module CPQNCSA.NLM is the NIC agent for Compaq Insight Manager and is not necessarily required, unless you want to use Insight Manager and get your NIC card info etc.

We have similar problems with different versions of this module on ML370 NW5.1 SP3 and SP5 servers also running CPQANS for load balancing and we decided to unload the module or remove the line from the file CPQSNMP.NCF that loads these insight manager modules to avoid High CPU utilization that lead to errors as you mention and servers abends.

I have not found a real solution yet that would fix this for us and since Insight Manager software does not play any big role on our servers, we decided to remove troublesome agents or simply not use this software on our servers.